摘要:
A lug plate 11 is secured to a drive shaft 7 which is rotatably supported in a housing so as to rotate together with the drive shaft, and a swash plate 12 is operatively connected to the lug plate through a hinge mechanism so as to rotate together with the lug plate and so as to vary an angle with respect to the drive shaft 7. Pistons 17 which are received in cylinder bores la so as to reciprocally move are operatively connected to the swash plate 12, so that not only can a refrigerant be introduced and discharged in accordance with the rotation of the drive shaft 7, but also the stroke of the pistons 17 can be varied by varying the angle of the swash plate 12. A front radial bearing 9B is provided on the outer periphery of a boss portion 11A of the lug plate 11 and a coil spring 16 to bias the swash plate 12 is received in a spring receiving portion 11C formed in the lug plate 11 on the rear side thereof.
摘要:
A displacement control valve for a compressor is provided. When current to a coil is stopped due to, for example, a broken wire, the control valve prevents the load acting on a variable displacement compressor from becoming excessive. A suction chamber is connected to a crank chamber by a control passage. A bellows actuates a valve body in accordance with the pressure in a suction chamber thereby regulating the opening size of the control passage. The compressor displacement is varied accordingly. A solenoid varies the attraction between a plunger and a fixed core in accordance with the level of current supplied to a coil thereby changing a target pressure. The bellows is actuated based on the target pressure. The solenoid increases the target pressure as the current to the coil is decreased. When the current to the coil is stopped, the solenoid maximizes the target pressure.
摘要:
A variable displacement compressor has a housing, a drive shaft, a rotor, a swash plate, a piston and a decelerating mechanism. The housing includes a cylinder bore and supports the drive shaft. The rotor is secured to the drive shaft. The swash plate is operatively connected to the rotor and the drive shaft so as to rotate therewith and varies its inclination angle relative to the drive shaft. The piston is connected to the swash plate so as to reciprocate in the cylinder bore with rotation of the swash plate. A stroke of the piston varies in accordance with the inclination angle of the swash plate. The deceleration mechanism between the rotor and the swash plate decelerates the inclination speed of the swash plate in a range from a near maximum inclination angle to the maximum inclination angle when the swash plate inclines to increase the stroke of the piston.
摘要:
A control valve controls the pressure in a crank chamber of a compressor to change the displacement of the compressor. The compressor includes a discharge chamber, a suction chamber and a supply passage, which connects the discharge chamber to the crank chamber. The control valve regulates the supply passage. The control valve includes a valve body, a spool and a solenoid. The valve body adjusts the size of an opening in the supply passage. The spool moves the valve body in accordance with the difference between the pressure in the discharge chamber and the pressure in the suction chamber. The solenoid urges the valve body by a force, the magnitude of which corresponds to a supply of electricity. The urging force of the solenoid represents a target value of the pressure difference. The spool moves the valve body such that the pressure difference seeks the target value. The control valve, which is located in the compressor, permits the compressor displacement to be accurately controlled regardless of a thermal load on an evaporator.
摘要:
A compressor has a housing and a cylinder bore. A piston is accommodated in the cylinder bore. A drive shaft is supported by the housing. An annular support plate is driven by the drive shaft. The support plate surrounds the drive shaft and inclines with respect to the axis of the drive shaft. The support plate has an boss. A radial bearing located about the boss. The radial bearing has an outer race. A disk-like swash plate is formed integrally with the outer race. The swash plate is connected the piston to cause the piston to reciprocate.
摘要:
An air-conditioning apparatus having a refrigerant circuit including a condenser, a pressure reducing device, an evaporator, and a variable displacement compressor. The air-conditioning apparatus has a torque detecting device and an external information detecting device. The torque detecting device directly or indirectly detects the reaction torque acting on the compressor, and the external information detecting device detects various external information other than the torque. The air-conditioning apparatus further has a control device for determining a target torque in accordance with the external information provided by the external information detecting device. The control device executes a feedback control program for controlling the displacement of the compressor such that the torque detected by the torque detecting device approaches the target torque.
摘要:
According to the structure for damping the pulsations of discharge pressure of a compressor of the present invention, in the annular discharge chamber 28 divided on the outer circumferential side in the rear housing 5, two bulkhead sections 35 are extended from positions on both sides of the outlet 23 in the circumferential direction in such a manner that they are separate from each other. The end portion of each bulkhead section 35 is extended to halfway between the first discharge port section 20 and the second discharge port section 21. The flow path from the first discharge port section 20 to the outlet 23 is directed to the opposite side to the outlet 23 and then turned back to the outlet 23. Therefore, the length of the flow path from the first discharge port section 20 to the outlet 23 becomes relatively long.
摘要:
A maximum inclination setting projection comes into contact with a rotary support in a region closer to a point corresponding to a top dead center than an imaginary two-part dividing plane, thereby establishing a maximum angle of inclination of a cam plate. Thus, a hinge mechanism is not required to support any proportion of a compressive load in the region closer to the point corresponding to the top dead center than the imaginary two-part dividing plane when the cam plate is in its maximum angle of inclination. Bulbous parts of guide pins do not come in contact with halves of cylindrical inside surfaces of guide holes closer to the rotary support, and there is made a clearance between the bulbous part of the guide pin and the guide hole and between the bulbous part of the guide pin and the guide hole, interrupting transmission of the compressive load between them.
摘要:
A compressor includes a transpire passageway exclusively communicated with a suction pressure area, and a throttle constituted by a clearance gap between an inner peripheral surface of an end portion of the shaft hole adjoining a crankcase chamber and an outer peripheral surface of a drive shaft. The transpire passageway has one end passageway portion being opened at a sealed portion sealed by a shaft sealing member disposed in a shaft hole. The transpire passageway has another end passageway portion being opened a suction pressure area.
摘要:
A variable displacement compressor that decreases displacement to reduce compression load without imbalancing the rotation of the drive shaft when the rotating speed of the compressor's drive shaft exceeds a predetermined limit value. The compressor includes a pressurizing passage connecting a crank chamber to a discharge chamber. A rotated guide rotates integrally with the drive shaft. The pressurizing passage is opened and closed by a valve body. Orbiting balls, which contact the valve body, are arranged about the axis of the drive shaft and the rotated guide. The balls follow the rotation of the rotated guide and orbit about the axis. The orbiting radius of the balls varies. A spring urges the balls in a direction decreasing the orbiting radius of the balls. When the rotating speed of the drive shaft exceeds the limit value, centrifugal force moves the balls against the force of the spring and increases the orbiting diameter of the balls. This moves the valve body and increases the size of the pressurizing passage.